<template>

    <div class="app-container">

        <h2 style="text-align: center;">发布新课程</h2>

        <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
            <el-step title="填写课程基本信息"/>
            <el-step title="创建课程大纲"/>
            <el-step title="最终发布"/>
        </el-steps>

        <!--<el-button type="text" @click="openChapterDialog()">添加章节</el-button>-->
        <el-button style="margin-left: 150px" type="primary" icon="el-icon-edit" @click="openChapterDialog()" round>
            添加章节
        </el-button>
        <ul class="chapterList">
            <li v-for="chapter in chapterVideoList" :key="chapter.id">
                <p>
                    {{chapter.title}}
                    <span class="acts">
                        <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                        <el-button type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                        <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                    </span>

                </p>
                <ul class="chapterList videoList">
                    <li v-for="video in chapter.children" :key="video.id">
                        <p>
                            {{video.title}}
                            <span class="acts">
                                <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                            </span>

                        </p>
                    </li>
                </ul>

            </li>
        </ul>
        <div>
            <el-button @click="previous">上一步</el-button>
            <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
        </div>


        <!-- 添加和修改章节表单 -->
        <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
            <el-form :model="chapter" label-width="120px">
                <el-form-item label="章节标题">
                    <el-input v-model="chapter.title"/>
                </el-form-item>
                <el-form-item label="章节排序">
                    <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
            </div>
        </el-dialog>

        <!-- 添加和修改课时表单 -->
        <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
            <el-form :model="video" label-width="120px">
                <el-form-item label="课时标题">
                    <el-input v-model="video.title"/>
                </el-form-item>
                <el-form-item label="课时排序">
                    <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
                </el-form-item>
                <el-form-item label="是否免费">
                    <el-radio-group v-model="video.isFree">
                        <el-radio :label="1">免费</el-radio>
                        <el-radio :label="0">默认</el-radio>
                    </el-radio-group>
                </el-form-item>

                <!--上传视频-->
                <el-form-item label="上传视频">
                    <el-upload
                        :on-success="handleVodUploadSuccess"
                        :on-remove="handleVodRemove"
                        :before-remove="beforeVodRemove"
                        :on-exceed="handleUploadExceed"
                        :file-list="fileList"
                        :action="BASE_API+'/eduVod/video/uploadAliyun'"
                        :limit="1"
                        class="upload-demo">
                        <el-button size="small" type="primary">上传视频</el-button>

                        <el-tooltip placement="right-end">
                            <div slot="content">最大支持1G，<br>
                                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                                SWF、TS、VOB、WMV、WEBM 等视频格式上传
                            </div>
                            <i class="el-icon-question"/>
                        </el-tooltip>

                    </el-upload>

                </el-form-item>
                <!--<el-form-item label="已上传">-->
                <!--    已上传视频:<span>{{this.video.videoOriginalName}}</span>-->
                <!--</el-form-item>-->

            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
                <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
            </div>
        </el-dialog>
    </div>
</template>

<script>
	import chapter from "../../../api/edu/chapter";
	import video from "../../../api/edu/video";

	export default {
		data() {
			return {
				saveBtnDisabled: false,
				saveVideoBtnDisabled: false,
				chapterVideoList: [],
				courseId: '',
				chapter: { //封装章节数据
					title: '',
					sort: 0
				},
				video: {
					title: '',
					sort: 0,
					isFree: 0,
					videoSourceId: '',
					videoOriginalName: ''//视频名称
				},
				dialogChapterFormVisible: false,//章节弹框
				dialogVideoFormVisible: false,//小节弹框
				fileList: [],//上传文件列表
				BASE_API: process.env.BASE_API // 接口API地址
			}
		},
		created() {
			//获取路由的id
			if (this.$route.params && this.$route.params.id) {
				this.courseId = this.$route.params.id
				this.getChapters()

			}
		},
		methods: {
			//=================视频操作==========================
			//点击确定调用的方法
			handleVodRemove() {
				//调用接口的删除视频的方法
				video.deleteAliyunVideo(this.video.videoSourceId)
					.then(response => {
						//提示信息
						this.$message({
							type: 'success',
							message: '删除视频成功!'
						});
						//把文件列表清空
						this.fileList = []
						//把video视频id和视频名称值清空
						//上传视频id赋值
						this.video.videoSourceId = ''
						//上传视频名称赋值
						this.video.videoOriginalName = ''
					})
			},
			//点击×调用这个方法
			beforeVodRemove(file, fileList) {
				return this.$confirm(`确定移除 ${file.name}？`);
			},
			//上传视频成功调用的方法
			handleVodUploadSuccess(response, file, fileList) {
				//上传视频id赋值
				this.video.videoSourceId = response.data.videoId
				//上传视频名称赋值
				this.video.videoOriginalName = file.name
			},
			handleUploadExceed() {
				this.$message.warning('想要重新上传视频，请先删除已上传的视频')
			},
			//====================小节操作======================
			//删除小节
			removeVideo(id) {
				this.$confirm('此操作将删除该小节记录, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).then(() => {
					video.deleteVideo(id).then(response => {
						//关弹框
						this.dialogChapterFormVisible = false
						//提示信息
						this.$message({
							type: 'success',
							message: '删除小节信息成功!'
						});
						//刷新页面
						this.getChapters()
					})

				}).catch(() => {
					this.$message({
						type: 'info',
						message: '已取消删除'
					});
				});
			},
			openEditVideo(videoId) {
				//回显数据
				this.dialogVideoFormVisible = true
				video.getVideo(videoId).then(response => {
					// console.log(response.data.chapter)
					this.video = response.data.video
                    console.log(this.video)
                    //回显视频列表
                    this.fileList = []
                    if(this.video.videoOriginalName!==''){
						this.fileList.push({
							name:this.video.videoOriginalName
						})
                    }
				})
			},
			//添加小节弹框的方法
			openVideo(chapterId) {
				//清空数据
				this.video = {}
				this.dialogVideoFormVisible = true

				//设置章节id
				this.video.chapterId = chapterId

				this.video.courseId = this.courseId

			},
			addVideo() {
				video.addVideo(this.video).then(response => {
					console.log(response)
					//关弹框
					this.dialogVideoFormVisible = false
					//提示信息
					this.$message({
						type: 'success',
						message: '添加小节信息成功!'
					});
					//刷新页面
					this.getChapters()
				})
			},
            updateVideo(){
				video.updateVideo(this.video).then(response => {
					console.log(response)
					//关弹框
					this.dialogVideoFormVisible = false
					//提示信息
					this.$message({
						type: 'success',
						message: '更新小节信息成功!'
					});
					//刷新页面
					this.getChapters()
				})
            },
			saveOrUpdateVideo() {
				if(this.video.id){
					this.updateVideo()
                }else {
					this.addVideo()
                }
			},
			//==================章节============================/
			openChapterDialog() {
				this.dialogChapterFormVisible = true
				this.chapter.title = ''
				this.chapter.sort = 0
			},

			//修改章节弹框数据回显
			openEditChapter(chapterId) {
				console.log("xxxxx")
				this.dialogChapterFormVisible = true
				chapter.getChapter(chapterId).then(response => {
					console.log(response.data.chapter)
					this.chapter = response.data.chapter
				})
			},
			//删除章节
			removeChapter(chapterId) {
				this.$confirm('此操作将删除该章节记录, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).then(() => {
					chapter.deleteChapter(chapterId).then(response => {
						//关弹框
						this.dialogChapterFormVisible = false
						//提示信息
						this.$message({
							type: 'success',
							message: '删除章节信息成功!'
						});
						//刷新页面
						this.getChapters()
					})

				}).catch(() => {
					this.$message({
						type: 'info',
						message: '已取消删除'
					});
				});
			},

			saveOrUpdate() {
				if (this.chapter.id) {
					this.updateChapter()
				} else {
					this.addChapter()
				}
			},
			updateChapter() {
				chapter.updateChapter(this.chapter).then(response => {
					console.log(response)
					//关弹框
					this.dialogChapterFormVisible = false
					//提示信息
					this.$message({
						type: 'success',
						message: '修改章节信息成功!'
					});
					//刷新页面
					this.getChapters()
				})
			},
			addChapter() {
				this.chapter.courseId = this.courseId
				chapter.addChapter(this.chapter).then(response => {
					console.log(response)
					//关弹框
					this.dialogChapterFormVisible = false
					//提示信息
					this.$message({
						type: 'success',
						message: '添加章节信息成功!'
					});
					//刷新页面
					this.getChapters()
				})
			},
			//根据课程id查询章节和小节
			getChapters() {
				chapter.getChaptersByCourseId(this.courseId).then(response => {
					this.chapterVideoList = response.data.list
				})
			},

			previous() {
				this.$router.push({
					path: '/course/info/' + this.courseId
				})
			},
			next() {
				this.$router.push({
					path: '/course/publish/' + this.courseId
				})
			}
		}
	}
</script>

<style scoped>
    .chapterList {
        position: relative;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .chapterList li {
        position: relative;
    }

    .chapterList p {
        /*float: left;*/
        font-size: 20px;
        margin: 10px 0;
        padding: 10px;
        height: 70px;
        line-height: 50px;
        width: 100%;
        border: 1px solid #DDD;
    }

    .chapterList .acts {
        float: right;
        font-size: 14px;
    }

    .videoList {
        padding-left: 50px;
    }

    .videoList p {
        /*float: left;*/
        font-size: 14px;
        margin: 10px 0;
        padding: 10px;
        height: 50px;
        line-height: 30px;
        width: 100%;
        border: 1px dotted #DDD;
    }
</style>